Hair clipper



HAIR CLIPPER. APPLICATION man MAY '16. 1921.

'1,41 6, 1 1 5. Pai-ema May 16, 1922.

`COl'JLIElEL11.51'.ON'ROE 0F WAGO, TEXAS,

Hera enteritis.

talents.

Waco, in the .county of McLennan and .State of Texas, have invented certain new and useful Improvements in Hair Clippers, of

`which the following is a specification.

This invention relates to new and useful improvements in hair clippers..

The object of the-invention is to eliminate vibration and to ,transmit lto the voperating lever andcutter blade, a maximum power, thus making for' areduction of lost motion. Another .object of the invention is to sim-l plify the construction and ,produce a clipper more easily handled and more eflicient in its work.V

In carrying out the invention a volute or spiral driving gear .is employed to'drive the gear which swings ,the operating lever. It will be noted that the spiral driving niember engages said gea-rat a central kposition with relation tothe swing of 'the lever, whereby a consta-ntdrivingrelation `is maintained and compensation for wear is had. Also the tension plate has Contact with the blade entirely across its front yend which reduces wear and is superiortto the `lugs commonly used. A further feature ofthe invention is the elimination Aof packing strips adjacent the pivot post of y the 'operating lever.

A construction designed to carry out the. invention will be hereinafter described together with other features of vthe invention.

The invent-ion will be more readily under-y stood from areading of the following specification and by reference to the accompanying drawings, in which an example of the inventionv is shown and wherein: s

AFig. 1 is a plan view of a device constructed in yaccordance with my invention,

Fig. side elevation of the same.

F.'g. 3 is e plan .View 0f the device With the cover and tension plates removed and a perdon in Section,

'Figli is a longitudinal vertical sectional view,

Fig. 5 Yis a face View of the volute gear disk,

Fig. 6 is a. detail `showingthe engagement between the gear disk andthe gea-r, said gear disk being rshown in section along thelines 6-6 of Fig. 5.

In the drawings lthe numeral designates a .casing ha/.Vins .af reduced Shank ll 'at its 15 are Specification of Letters Patent. Patgnted lay 51922. Application filed May 16, l i

1921. SerialNo. 469,842. 4

rear end. The forward end of the casing is inclined and a cutter ,blade 12 is suitably fas,- tened thereto. Atl the forward end of the casing a transverse bridge 13 is provided and; receives an upright pivot- .studl 141 .which is ra'rNT orF1cE1.

screw thereinto and also has its `upperfend screw threaded.v Inwardly directed flanges provided along the .fronty edge rof the bridge. f

The fixed cutter blade 12 isprovidedwith the usual @Standing -letaneidar .lugs 1.6 which are received ,in the .rectangular Slots 17 ofthe usual reciprocating bledel. gThe blade 18 has a central notch 19 yin its rear edge .Which is adapted ltorece-ive lthe arrn 2Q on the front end'of an operating lever 21. which latter is pivoted on thestud 14 and supported on the bridge 13. The lever 21 has a segment 22 from which vtliefarni 2O extends. This segment is disposed forwardly ofthe stud and is arranged :to swing between thecurved ends olf the-flanges 15..y Bythis arrangement packing strip-sy are eliminiiid and a more practical construction ha.d.` .The reciprocating blade 418- is Amounted on the bladel12 in the usual inannerand yis adapted to be reciprocated whenk the. lever" 21 lis swung. f l

f The lever 21 has a central longitudinal slot 23 in its rear end receivinga slide-block 24E which is confined on an eccentric lpin 25 carried on the upper side of a. gear wheel 26. The geel wheel'26 is supported on astrid 27 mounted in the bottom olf the casing 1Q. 'In the shank 111 dispose longitudinally ofthe device, a shaft y28 which is pro-vided with a circumferential groove l29 `receiving the end of ay set screw 3,0 whereby 'said shaft held against longitudinal displacement. The rear end of the 'shaft projects intoa counter bore 31 andis adapted to beconnectedfwitha flexible' Shaft#- (lot Shown) l-v'h'ch is' wdriven bv `an `electr-.kfmotor5.01" any ether ,me Sl- The` .Screw 30 also festem @spring latch@ which Oveflharlgs the" counter 'here 3l" for, holding' the .eXbleShefttherein; L

'It .has'been Customary tO- r'drive.the gear wheel 26 in clippers of this type, bynieansojf al Worm. vSuch driving mechensmlnrducs considerable `vibration yand this vvibfration causes the cutter bladetoskip, sof that' the hair, is not cut during kthese lskips and the to support the tension plate 37.

to operate the worm drive at a much higher rate of speedthan is contemplated with the present invention. @n the `inner or forward end of the shaft 28 l mount a volute eea-r',

disk 33 which has on its 'tace a spiral or volute driving member The disk is placed 'substantially tangentially to the 26 and the outer end of the spiral member is reducedr so as to more readillv'enter hetween the teeth ot the gear wheel. lt will be seen that the outer endet the spiral meinber engages with the teeth on a linewhich substantially registers with the central position of the lever 21'. This point of engagem ment is substantially in alinement with the pivot points of the lever and the gear and it will be seen that when the block Q4 reaches either end or" its stroke it will also be alined; with said pivot points and the volute gear will be exerting its force on the gear 26 'at right angles to this alinement. consequently there will be no tendency on the part ot the block and lever to bind. and a .much smoother operating device will be had. lt is pointed out that wear will have little or noetleot upon the transmission, ot motion 'to the gear Wheel 26.

The upper side of `the easing is reduced to receive a flat cover plate 3:3 oont'ormiupl to thecontour thereoiand penetrated by the stud 14. This cover plate has an upset portion 36 over the disk 33. l also provide a tension plate 37 which overhanrgs the sides ot the casing` at the front end thereof and. has its rearend resting on the cover plate. The tension plate has its front 3S contasting with the blade 1S throughout its length. whereby it exerts an even pressure on said blade and holds it in the desired relation with the blade 12. The ystud 14 penetrates the plate 37 and receives a coiled spring' 39 between the plates which sprintfl acts to hold the @over plate 35 in pl ace and A tension spring` 40 is mounted on' the stud and bears on the plate 37. The tension saring` ie conH fined by a nut 41 screwed on the upper end ofthe stud 14.` By adjnstirrgv this nut the pressure of the plate 3,7; on th blade 18 is regulated.

It will be seen that by having` tde tension 4.device is more easily grasped and held in. the hand of the operator. The shank is pro` ,a gear arranged within the easing. a lever pivotally mounted within the casing' to swing; in aplane approximately parallel 'with the plane oit rotation of the geara said lever having its forward end connected with the reciprocating cutter and its rear end entendn ing` over one side of the gear and terminating at a point inwardly of the rear portion of the gear, means connecting the lever and gear, a gear-disk mounted within the easing' rearwardly ojt the rear and having its plane of rotation at substantially a ri ght angle to the plane ot rotation ot said gear,k saidvr geandisk being-provided upon its torward side with a curved drive rib Ator engaging the teeth ot said gear, said gear.- disk extending laterally beyond the lgear and being tree trom engagement with the rear end of said' lever, and a shaft carrying the gear-disk and 'journaled in the rear portion of the casing',

2. In a hairclipping device, a casing, a cutter blade Carried by the forward end ot the easing, areoiproeating lmitterblade ooeeting with the first named cutter blade, a gear arranged within the easing?7 a lever pivotally mounted within the easing` to swing iny a plane approximately parallel with the plane of rotation of' the gear, said lever having its forward end connected with kthe reciprocating cutter and its rear end extending over one side of the 2gear and terminating at a point inwardly ot the rear portion ot the gear. means Connecting the lever and gear. a eea-.1*Clisk mounted within the casir` ma ywardly of the gear and having; its plane of :rotation at substantially .L

gear? said gear-disk being providednpon its 't rward side with a curved drive rib for ngjaging the teeth of said gea-r9 said gear disk extending laterally beyond the gear and being )free trom engagement with the rear end ot sai d levert and a sh att extending longitudinally through the rear portion ot said easing and projecting into the easing for connection with the gear-disk. said shatt having a shoulder between the gear-disk and the end wall of the easing, said shoul-` der serving` to prevent the rearward longi tudinal movement of the longitudinal shaft byfoontacting with said end wall.

' 3. ln a hair clipping device, a casing, said -e o the plane of rotation of said.

casing having' its side walls pressed in wardly providingv exterior recesses for the reception ol the lingers of the operator, a cutter blade Carried by the forward end of the easing in advance of said recesses, a reciprocating cutter blade ooaeting with the {irst nanied cutter blade, agear arranged within the easing' rearwardly of said eXte-' rior recesses, a leverl pivotally mounted within the easing' to swingin a plane approximately parallel withthe plane of rotation of the gear, said lever having its forward end connected with the reciprocating' Cutter and its rear endextending over one side of the Arear and terminating at a vpoint inwardly of the rear portion of said gear, means connecting the lever and gear, a shaft extending longitudinally off the easing with its Yforward end projecting into'the .interior of the casing, said shaft being` arranged wholly rearwardly 0l said gear, a geardisk mounted upon the forward end of said shaft and rearwardly of said gear and having' its plane yof rotation at substantially a right angle to the plane of .rotation of said Qfear, said gear-disk being provided upon its n forward side with a curved drive rib for engaging the teeth of said gear, said geardisk extending laterally beyond. the gear and being free from engagement with the rear end of said lever.

ln testimony whereof I a'HiX niy signature.

COLLIER MONROE. 

